JP2006044861A - Crane girder/saddle assembling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling device enabling a small number of workers to assemble a crane girder and a saddle in a short time to reduce the assembly man-hours of an overhead crane. <P>SOLUTION: The assembling device is provided with a girder direction (Y-direction) rail 1 having a length corresponding to the span (girder length) of the overhead crane; a pair of saddle bases 2, 4 provided at both end parts of the girder direction rail so that at least one saddle base is movable along the rail; a pair of moving bases 6 in the right-angled direction (X-direction) to the girder on the respective saddle bases; lifting bases 21 on the respective moving bases in the right-angled direction to the girder; and X-direction adjusting bases and Y-direction adjusting bases on the respective lifting bases. The spacing of the saddle bases 2, 4 and the positions and spacing of the pair of X moving bases 6 on the respective bases are set according to the span of the overhead crane to be assembled and the dimensions of a wheel base, and the saddle is supported by placing bases 8 at the tops of the pair of X moving bases to measure the position relation and to adjust the height of the lifting bases 21 and the position of the X-direction adjusting bases 9 and Y-direction adjusting bases 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an assembling apparatus used for assembling a girder and a saddle of an overhead crane.

  As shown in FIG. 6, the overhead crane fixes two traveling rails 32 in parallel to each other at a predetermined interval on the upper part of a building 31 such as a factory or a warehouse, and both ends are attached to the saddle 7 traveling on each traveling rail. Two girders 33 are mounted in a fixed state, a hoisting machine 35 is mounted on a trolley 34 that travels along the girders 33, and a hook 36 that moves up and down by the hoisting machine is attached to the two girders 33. It is a structure suspended from the tip of a wire 37 that passes between them. There are various types of overhead cranes. Generally, the span (girder length) is several tens of meters, and the wheel race (saddle wheel spacing) is several meters.

  For assembling the overhead crane girder and saddle, it is necessary to fix both ends of two long girders at the correct positions on the upper surface of the saddle on each side. Conventionally, the crane girder and saddle are assembled by a method as shown in FIG.

  That is, the four mounts 39 are arranged at intervals corresponding to the span S and the wheel base W (FIG. 7A), and the saddle 7 is placed in a state where both ends are supported by the two mounts 39. In this state, while measuring the distance S between the saddles on both sides, the diagonal dimension C, and the level (height) H, the saddle 7 is positioned on the mount 39 using a crane ((b) in the figure). After the position of the saddle 7 is set, two girders 33 are placed thereon and fixed by welding or bolting ((c) in the figure).

  However, assembling work by the above-described conventional method requires repeated lifting and lifting work of the saddle 7 by the crane when setting the positional relationship between the two saddles 7, and includes many skilled crane operators. There is a problem that it requires a lot of workers and takes a long time.

  An object of the present invention is to reduce the number of man-hours for assembling an overhead crane, and it is an object of the present invention to provide technical means that allows a small number of workers to assemble a crane girder and saddle in a short time.

  The present invention enables a girder direction (Y direction) rail 1 having a length corresponding to a span (girder length) of an overhead crane and at least one of the end portions of the girder direction rail to be movable along the rail. A pair of saddle bases 2, 4, a pair of girder-perpendicular (X-direction) moving bases 6 on each saddle base, a lift 21 on each girder-perpendicularly-moving base, and each lift The above problem is solved by providing an assembly device for a crane girder and a saddle, which includes an upper girder direction (X direction) adjustment table and a girder direction (Y direction) adjustment table.

  The crane girder and saddle assembling work using the assembling apparatus of the present invention is performed as follows. First, the distance between the two saddle bases 2 and 4 and the position and distance of the X moving bases 6 and 6 on each base are set according to the span and wheel base of the overhead crane to be assembled.

  Since the positional relationship of the two saddle bases 2 and 4 in the direction orthogonal to the rails 1 is defined by the rails 1, the reference position of the X moving base 6 on each base is determined by the assembly apparatus of the present invention. After installation, it can be obtained by measuring the positional relationship between the two bases 2 and 4. Therefore, given the span of the overhead crane to be assembled and the dimensions of the wheel base, the distance between the saddle bases 2 and 4 and the position of the X moving bases 6 and 6 on each base can be set.

  In this state, the saddle 7 is mounted on the mounting table 8 at the top of the pair of X moving tables 6 provided on each base. The both ends of the saddle 7 placed on the two X moving bases 6 on the saddle base 2 are positioned above the elevating base 21, the X adjusting base 9 and the Y adjusting base 10 (either the X adjusting base or the Y adjusting base). Therefore, the relative positional relationship between the two saddles mounted is measured, and an amount corresponding to an error from the predetermined positional relationship is measured by the four lifting platforms 21, The X adjustment table 9 and the Y adjustment table 10 are corrected by appropriately adjusting the height or position. These adjustments are performed by stopping the operation of the manual handle or the electric motor.

  If the assembly apparatus of this invention is used, the space | interval of the saddle bases 2 and 4 and the position and space | interval of a pair of X movement stand 6 on each base will be set with the span of the overhead crane to be assembled, and the dimensions of the wheel base. Next, the saddle of the overhead crane is supported by the mounting table 8 at the top of the pair of X moving tables on each base, the relative positional relationship is measured, and the deviation from the predetermined positional relationship is provided in each X moving table. The height can be easily corrected by adjusting the height of the lifting platform 21 and the positions of the X adjustment table 9 and the Y adjustment table 10.

  Accordingly, the crane girder and saddle can be assembled by a small number of workers and in a much shorter time than the conventional method.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are a schematic plan view and a side view seen from the side in the longitudinal direction of the entire assembly apparatus of the present invention.

  In the figure, reference numeral 1 denotes a rail in a girder direction provided on a floor board, and the interval between two rails 1 is several meters and the rail length is several tens of meters. A fixed-side saddle base 2 is disposed at one end in the longitudinal direction (Y direction) of the rail 1, and a moving-side saddle base 4 provided with wheels 3 that roll on the rail 1 is provided on the other side. Has been placed. Outriggers 5 for fixing or stabilizing the bases are provided at both ends and the center of each saddle base 2, 4 in the longitudinal direction (direction orthogonal to the rail, X direction).

  At both ends of the upper surfaces of the bases 2 and 4, X moving bases 6 that can be moved in the X direction are mounted, and mounting bases 8 that support the saddles of the overhead cranes are provided on the tops of the X moving bases. It has been. The mounting table 8 is provided with a fixing tool for fixing the positioned saddle, such as a screw hole for a fixing bolt. This mounting table is the same member as either an X adjustment table 9 or a Y adjustment table 10 (described later in the figure) provided on each X moving table 6.

  3 to 5 are diagrams showing details of the end of the moving base and the X moving base mounted thereon, FIG. 3 is a view seen from the direction A in FIG. 1, and FIG. FIG. 5 is a plan view seen from the direction B.

  In these drawings, 3 is a wheel that rolls on the rail 1 described above, a wheel that rolls on one of the rails 1 is a hooked wheel, and a wheel that rolls on the other rail is a hookless wheel, The rail on which the wheel with the hook travels defines the reference position in the X direction of the bases 2 and 4. The axle stand 11 that supports the wheel 3 is provided with a lock device 12 that clamps the rail 1 from both sides. The axle base 11 is integral with the base 4, and the locking device 12 is a manual type equipped with a clamp screw 13.

  Two LM (linear motion) guides (hereinafter referred to as “X movement guides”) 14 in the X direction are fixed to both ends of the upper surfaces of the bases 2 and 4, and two adjacent LM (linear motion) guides 14 are adjacent thereto. The rack 15 is fixed. The X moving table 6 is slidably mounted on the X moving guide 14. A pinion shaft 16 in the Y direction is pivotally supported on the X moving table 6, and two pinions 17 fixed to the pinion shaft mesh with the two racks 15. A handle 18 is provided at one end of the pinion shaft 16, and the X moving table 6 is moved by turning this handle.

  The X moving base 6 is a substantially square base, and vertical guide holes are provided in the inner portions of the four corners, and a motor-driven jack 20 is mounted at the center. A lifting platform 21 is fixed on the jack 20, and a guide rod 22 having an upper end fixed to the lifting platform is slidably inserted into the guide hole. That is, when the electric motor of the jack 20 is driven forward / reversely, the lifting / lowering base 21 moves up / down on the X moving base 6.

  An LM guide (hereinafter referred to as “X adjustment guide”) 23 in the X direction is provided on the lift 21, and the X adjustment table 9 is slidably mounted on the X adjustment guide. An X feed screw 24 is provided at the center of the two X adjustment guides 23 in parallel with the X adjustment guide 23, and this X feed screw is screwed to a feed nut (not shown) provided on the X adjustment table 9. An operation shaft 25 in a direction orthogonal to the X feed screw 24 is pivotally supported on the elevator 21, and the operation shaft 25 and the X feed screw 24 are rotationally connected by a pair of bevel gears in a gear box 26. ing. A square shaft portion 27 for inserting a manual handle is formed at the tip of the operation shaft 25. The operator can adjust the position of the X adjustment base 9 in the X direction by inserting the proximal end of the manual handle into the angular shaft portion 27 and turning the handle.

  Two LM guides (hereinafter referred to as “Y adjustment guides”) 28 in the Y direction are mounted on the upper surface of the X adjustment table 9, and the Y adjustment table 10 is slidable on the Y adjustment guide. It is installed. In the center of the two Y adjustment guides 28, a Y feed screw 29 is pivotally supported on the X adjustment base 9 in parallel with the Y adjustment guide 28, and the Y feed screw is provided on the Y adjustment base 10. It is screwed into the feed nut that is not. One end of the Y feed screw 29 is formed with an angular shaft portion 27 similar to that provided on the operation shaft 25, and the above-described handle is connected to the angular shaft portion of the operation shaft 25 and the angular shaft portion 27 of the Y feed screw 29. By alternately inserting and rotating, the positions of the Y adjustment table 10 serving as a saddle mounting table in the X direction and the Y direction are adjusted.

  Next, the assembly of the crane girder and the saddle using the above-described embodiment apparatus will be described. First, the moving side base 4 is pushed in accordance with the span of the crane girder to be assembled, the distance from the fixed side base 2 is set, and the moving side base 4 is fixed by the lock device 12. The outriggers 5 of the fixed side and moving side bases are advanced to stabilize the bases 2 and 4. Next, move the X-moving platform 6 on the side of the saddle wheel to a reference position, fix it with a clamping device (not shown), and adjust the X-moving platform 6 on the side of the saddle-less wheel according to the wheel base of the saddle to be assembled. Set the position and fix with the same clamping device.

  Next, in the state where the elevating table 21 of each X moving table is set to the middle height of the vertical stroke, and the X adjusting table 9 and the Y adjusting table 10 are set to the intermediate positions of the moving stroke, The saddle of the overhead crane is supported on each base in a state where both ends are supported by the Y adjusting table 10.

  Then, as shown in FIG. 7B, the distance S between the two saddles placed, the diagonal dimension C, the parallelism, the level H, and the like are measured, and the deviation from the predetermined dimension is calculated. Then, in order to correct this deviation, it is calculated how much the elevator 21 of the four X movable platforms is moved up and down, how much the X adjustment platform 9 is moved, and how much the Y adjustment platform 10 is moved. After that, the lifting table 21, the X adjustment table 9 and the Y adjustment table 10 of the X moving table selected according to the calculated amount are adjusted.

  With the above operation, the positional relationship between the two saddles 7 is set. Check the dimensional relationship, readjust if necessary to determine the saddle position, and place the saddle positioned with a fixture such as a fixing bolt. Secure to the pedestal 8. Next, the two girders 33 are mounted on the two saddles 7 positioned so that both ends are supported. After positioning the both ends of the girders 33 and the saddle 7 on each side, welding and bolting are performed. To fix the girder 33 to the saddle 7.

Schematic general plan view showing an embodiment apparatus 1 is a side view of the apparatus of FIG. 1 as viewed from the longitudinal direction. Detailed side view of the moving base end as seen from direction A in FIG. 1 is a front view of the moving side base end as seen from the direction B in FIG. Plan view of the base end shown in FIGS. Schematic perspective view of an overhead crane Explanatory drawing showing assembly order of crane girder and saddle by conventional method

Explanation of symbols

1 rail 2 fixed side saddle base 4 moving side saddle base 6 X moving base
21 Lifting platform

Claims (1)

  Girder direction rail (1) having a length corresponding to the girder length of the overhead crane, and a pair of saddle bases provided at both ends of the girder direction rail so as to be movable along the rail ( 2, 4), a pair of girder vertical moving platforms (6) on each saddle base, a lifting platform (21) on each girder vertical moving platform, and a girder vertical adjustment platform on each lifting platform And a girder / saddle assembling apparatus provided with a girder direction adjusting table.

Images